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Catalytic Synthesis of Ethyl Heptanoate by Nanometer Complex Heteropoly Acid

ZHANG Fu-juan and SHENG Shu-ling, (Department of Chemistry,Xuchang College, Xuchang, He'nan 461000, China)  
The synthesis of ethyl heptanoate from heptanoic acid and ethyl alcohol with nanometer H3PW12O40 / SiO2 as catalyst was studied and the results showed that nanometer H3PW12O40/ SiO2 was an ideal catalyst for the synthesis of ethyl heptanoate. The optimum technical conditions were summed up as follows: molar ratio of heptanoic acid to ethyl alcohol was 1∶1.7,the use level of catalyst was 5 %,the use level of water-carring toluene was 8 mL, the reaction time was 2 h,and the yield was about 96.8 %.
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